Re: parent transid verify failed + level verify failed

[Martin Steigerwald <martin@lichtvoll.de>]

Martin Steigerwald - 19.11.23, 12:34:44 CET:
> After having used linux-6.7-rc1 almost rc2, git commit
> 791c8ab095f71327899023223940dd52257a4173 in order to test out BCacheFS,
> back on 6.6.1 after two attempts of non working hibernation and a
> strange experience with GRUB presenting its command prompt instead of a
> boot menu¹, I now got this funny stuff:
> 
> [ 1849.408572] BTRFS error (device dm-1: state EA): parent transid
> verify failed on logical 1178386432 mirror 1 wanted 538478 found 538901

Finally recovered.

/ was not mountable anymore after booting into GRML. Made image with dd 
and restored from backup onto a newly created BTRFS.

/home also had errors. Did not take a chance. Scrubbed it, updated a 
backup with good old rsync, recreated filesystem and restored from updated 
backup.

Another filesystem with larger files that only sees user space writes when I 
write something to it, has been okay.

I have the following diagnostic data:

1) For /: dd image on external SSD with BTRFS, thus I can snapshot and/or 
ref-link copy it around and run various diagnostic stuff on it, btrfs check 
output (no repair), scrub was okay.

2) For /home: btrfs check output (no repair), scrub was okay.

3) I think I have some dmesg output from what caused the root filesystem 
going read only, but I think that is the output I already posted.

SMART status of 2TB Samsung 980 Pro disk okay. I do not assume that there 
is anything wrong with the device.

On what caused the corruption? No idea. Could be something wrong with that 
6.7-almost-rc kernel, could be some corruption that happened on failed 
hibernation attempts, could have to do something with BCacheFS albeit I 
doubt it. Anyway, I am back on 6.6.1 for now and will not touch 6.7 kernel 
again on this laptop before I am confident that it is is safe.

About diagnostic data: Willing to post more after the weekend. Just let me 
know what you need. Of course I am not willing to upload complete dd image 
somewhere, even not with just the operating system filesystem, but I can 
run stuff on it and provide output. Otherwise you can have any of the btrfs 
check output.

Best,
-- 
Martin